waste to power

Houston startup launches clean energy business to turn compost into hydrogen

Moonshot Compost has announced its plans to create green hydrogen at scale. Photo via Getty Images

You may already know Moonshot Compost, a Houston company devoted to collecting food waste all over Texas. Now, meet Moonshot Hydrogen.

Founders and brothers-in-law Chris Wood and Joe Villa have joined forces with energy industry veteran Rene Ramirez to harness their compost into clean hydrogen power.

Earlier this month, the new branch of the existing company signed a memorandum of understanding with the Purdue Innovates Office of Technology Commercialization. The agreement comes close to a year after Ramirez first began working with Purdue University Northwest professors, Robert Kramer and Libbie Pelter, and Purdue University’s professor, John Patterson. The result is the first operating commercial pilot that biologically turns food waste into hydrogen.

This revelation comes just days after the Biden-Harris administration announced that it had set aside $7 billion to H2Hubs, a collection of seven regional hydrogen power stations, including one in the Houston area.

“We love the timing. There’s just a lot of interest right now,” Wood tells EnergyCapital in a video call with Villa and Ramirez. “It's been fun to watch Rene's long relationship with Purdue come to fruition on behalf of that hydrogen at the same time that the DoD is moving forward with their announcement on the hydrogen hubs.”

Wood and Villa founded Moonshot Compost three years ago.

“The thought was, 'waste is so valuable, and there's so much of it in the trash.' So we wanted to focus on, ‘Let's get our hands on as much food waste as possible,’ and always be focused on doing the best thing with our food waste,” Wood says.

Initially, that meant making compost, which saved the waste from a landfill and produced high-quality, nutrient-rich soil. Customers include both private homes and commercial accounts. Those include heavy hitters like Rice University, Conoco Phillips and Texas Children’s Hospital, as well as beloved restaurants ranging from Bludorn to Tacodeli. And that’s just in Houston. The company now collects from businesses in Austin, Dallas and Waco, too.

That extended footprint will be important to Moonshot Hydrogen.

“Our big dream is ideally that we have one of these hydrogen facilities in almost every city that we can think of. Your city has that ability to charge up or refuel the cars with hydrogen at-location and not have to worry about going 300 miles away,” says Ramirez.

Filling up your car with zero-emission hydrogen made from compost? It could be a reality sooner than you think. According to Wood, Moonshot is already in the preliminary stages of discussions with a facility to pilot just such a program.

“We’ve been thrilled with how receptive people are. There does seem to be a general acknowledgment that this would fit well with Houston’s desire to be the energy transition capital of the world,” he says.

Their patent-protected technology assures that Moonshot is the only company with this novel solution to food waste. Most exciting is the fact that the institutions with which Moonshot already partners could be on the ground floor of being at least partially powered by their own discarded scraps.

“Everyone loves the circularity aspect of it,” says Ramirez. And with a potential launch as soon as next March, it’s one step closer to a reality for the Energy Transition Capital.

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A View From HETI

Rice University scientists' “recharge-to-recycle” reactor has major implications for the electric vehicle sector. Photo courtesy Jorge Vidal/Rice University.

Engineers at Rice University have developed a cleaner, innovative process to turn end-of-life lithium-ion battery waste into new lithium feedstock.

The findings, recently published in the journal Joule, demonstrate how the team’s new “recharge-to-recycle” reactor recharges the battery’s waste cathode materials to coax out lithium ions into water. The team was then able to form high-purity lithium hydroxide, which was clean enough to feed directly back into battery manufacturing.

The study has major implications for the electric vehicle sector, which significantly contributes to the waste stream from end-of-life battery packs. Additionally, lithium tends to be expensive to mine and refine, and current recycling methods are energy- and chemical-intensive.

“Directly producing high-purity lithium hydroxide shortens the path back into new batteries,” Haotian Wang, associate professor of chemical and biomolecular engineering, co-corresponding author of the study and co-founder of Solidec, said in a news release. “That means fewer processing steps, lower waste and a more resilient supply chain.”

Sibani Lisa Biswal, chair of Rice’s Department of Chemical and Biomolecular Engineering and the William M. McCardell Professor in Chemical Engineering, also served as co-corresponding author on the study.

“We asked a basic question: If charging a battery pulls lithium out of a cathode, why not use that same reaction to recycle?” Biswal added in the release. “By pairing that chemistry with a compact electrochemical reactor, we can separate lithium cleanly and produce the exact salt manufacturers want.”

The new process also showed scalability, according to Rice. The engineers scaled the device to 20 square centimeters, then ran a 1,000-hour stability test and processed 57 grams of industrial black mass supplied by industry partner Houston-based TotalEnergies. The results produced lithium hydroxide that was more than 99 percent pure. It also maintained an average lithium recovery rate of nearly 90 percent over the 1,000-hour test, showing its durability. The process also worked across multiple battery chemistries, including lithium iron phosphate, lithium manganese oxide and nickel-manganese-cobalt variants.

Looking ahead, the team plans to scale the process and consider ways it can sustain high efficiency for greater lithium hydroxide concentrations.

“We’ve made lithium extraction cleaner and simpler,” Biswal added in the release. “Now we see the next bottleneck clearly. Tackle concentration, and you unlock even better sustainability.

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